Katie Ledecky remains dominant in U.S. as bigger challenge awaits in Tokyo

OMAHA, Neb. — Katie Ledecky touched the wall far ahead of everyone else at the U.S. swimming trials.

No surprise there.

But the 24-year-old Bethesda, Maryland, native was taken aback by the time. It wasn’t as fast as expected, raising the stakes for an expected showdown in Tokyo with a ...